Pass the HwndSource parameters directly

[lindexi]

Description

The RegisterHwndForInput only be called by HwndStylusInputProvider..ctor. And the HwndStylusInputProvider..ctor will pass the HwndSource source to RegisterHwndForInput method. So that it unnecessary to use the PresentationSource in RegisterHwndForInput.

wpf/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/InterOp/HwndStylusInputProvider.cs

Lines 27 to 45 in ee7cbb8

	/////////////////////////////////////////////////////////////////////
	internal HwndStylusInputProvider(HwndSource source)
	{
	InputManager inputManager = InputManager.Current;
	_stylusLogic = StylusLogic.GetCurrentStylusLogicAs<WispLogic>();
	IntPtr sourceHandle;
	// Register ourselves as an input provider with the input manager.
	_site = inputManager.RegisterInputProvider(this);
	sourceHandle = source.Handle;
	_stylusLogic.RegisterHwndForInput(inputManager, source);
	_source = source;
	// Enables multi-touch input
	UnsafeNativeMethods.SetProp(new HandleRef(this, sourceHandle), "MicrosoftTabletPenServiceProperty", new HandleRef(null, new IntPtr(MultiTouchEnabledFlag)));
	}

Customer Impact

None.

Regression

Testing

Only CI

Risk

Low. I do not change any behavior.

Microsoft Reviewers: Open in CodeFlow

[Copilot]

Pull Request Overview

This PR optimizes the RegisterHwndForInput method by removing unnecessary casting from PresentationSource to HwndSource, since the caller already has an HwndSource instance.

• Removes unnecessary type casting in the RegisterHwndForInput method
• Changes the parameter type from PresentationSource to HwndSource to match actual usage

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[h3xds1nz]

Makes sense